Do snakes shed their skin?

As they grow, snakes shed
all of their skin. The skin comes
off like a sock, beginning at
the mouth. Snakes can only
shed their skin when the air
is moist. If the air is dry, the
skin does not come off.
This is dangerous for the
snake, since the
old skin can get
infected. Skin left
attached to the
tail can cut off
the supply of
blood to the tip
which can
cause it to
drop off.